Combined toilet tank and aquarium



FIG. 1 is a perspective view taken from the top, front and left side of a combined toilet tank and aquarium showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof; and

FIG. 7 is a rear elevational view thereof.

The broken line representation of plants and gravel in FIGS. 1 and 2, a toilet bowl in FIG. 1 and plumbing hardware in FIG. 7 is for purposes of illustration only and form no part of the claimed design. 

The ornamental design for a combined toilet tank and aquarium, as shown and described. 